高职《高分子化学》项目化教学的体会与思考

从项目化教学的优点、项目化教学课程项目的设计、项目化教学课程项目的实施和项目化教学考核评价体系的建立等4个方面总结对高职《高分子化学》一分为三的项目化教学的体会,并结合本院实际情况从项目化教学团队的建设、配套教材的建设以及软件和硬件设施的建设等3个方面作出了思考,期望更进一步的推进我院《高分子化学》项目化教学改革的进程。     

《有机化学》项目化教学探索与实践

《有机化学》是高职化工类专业的专业基础课,文章结合有机化学的课程特点,针对我国传统的教学模式中存在的一些问题,对该课程进行项目化教学改革探索,给出了该课程的项目化教学的教学设计、实施步骤、考核方法等方面的案例,以期为我国高职《有机化学》的教学改革提供借鉴。     

机械设计基础教学中项目导入法的应用

针对当前高职院校"机械设计基础"课程的现状及存在问题,提出了以项目为导向的高职"机械设计基础"课程项目化教学改革的具体构思,并以传动设计项目为例,详细介绍了项目任务安排、教学手段及评价标准,为高职院校"机械设计基础"课程项目化教学改革提供参考。     

环境监测与评价专业《仪器分析》项目化教学的实践

对环境监测与评价专业《仪器分析》课程进行基于环境监测工作情境的项目化教学改革实践,以"紫外-可见分光光度法"一章为例详细介绍课程项目化教学实践,从教学目标、教学内容、教学设计、课程考核等方面进行了探讨。     

数据库采用项目化教学法的探索、实践与体会

本文从数据库课程的背景、地位入手,提出了数据库课程进行项目化教学改革的必要性,着重分析了以前数据库传统教学模式的弊端及存在的问题,专门针对数据库实行项目化教学方法的程序步骤结合自身体会进行了阐述,最后将两种教学方法进行各方面对比,总结了数据库进行项目化教学的几点建议.     

精细化工专业涂料课程项目化教学改革的研究与探讨

涂料产业是广东珠三角地区精细化工产业中的一个重要组成部分,每年都需要大量的涂料专业人才。涂料课程是高职高专精细化工专业的一门专业核心课程,课程建设是培养合格技能型人才的关键。本文从项目化课程改革的角度出发,结合中山职业技术学院《涂料生产技术》课程项目化教学改革的实践,总结了涂料项目化教学的课程人才培养实施方法,并取得了良好的教学效果。     

《多晶硅生产技术》课程项目化教学改革实践

随着信息化、数字化技术的发展,学生获取知识的渠道增多,传统的教学方法已不适应现代社会的发展,进行课程教学改革势在必行。从多晶硅生产技术项目化课程设计、实践教学、课程考核、教学形式和方法入手,提出解决这些问题的具体意见和建议。自《多晶硅生产技术》实施课程项目化教学改革以来,学生综合素养、自主学习能力普遍比未实施课改的学生强。     

《钢筋混凝土结构施工》课程考核方式改革

我校的《钢筋混凝土结构施工》课程正在积极推进项目化课程改革,考核评价作为项目化课程教学的重要环节,是提高教学质量,培养学生专业技能和职业素养的重要手段。在本课程项目化教学的实践中,迫切需要形成科学实用、适用于项目化教学的评价体系。文章结合《钢筋混凝土结构施工》课程项目化教学改革的具体情况,对项目化教学的考核评价做了一定的探索,新的考核方法不仅能更加全面、真实地检验学生的学习效果,而且能更好地调动学生学习的积极性、主动性和创造性,有利于教学质量的提高。     

无机及分析化学课程改革的思考

"无机及分析化学"课程是高等职业院校化工类专业的专业基础课程。作为专业核心课程,其教学改革工作一直都备受关注。文章从课程的特性、思维方式、基本理论的教学等方面对课程整合的教学改革实践进行反思,提出了项目化与模块化相结合的课程教学设计思路。     

高职《实用化学品分析与检测》项目化课程教学实践

《实用化学品分析与检测》是精细化学品生产技术专业的一门重要的专业模块课程,是培养学生分析检测技能的核心课程。基于项目化的教学思路,本文从课程的教学目标、教学内容编排、教学实施过程和考核方式等方面介绍了高职实用化学品分析与检测的的项目化教学的实施过程,对化工分析类课程教学改革有一定的指导意义。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。